Scraper



C. LE BLEU Dec. 28, 1937.

SCRAPER Filed May 15, 1956 2 Sheets-Sheet l hmm INVENTQR.

BY i

A TTORNEYS.

C. LE BLEU Dec. 2s, 1937.

SCRAPER Filed May 15, 19:56

2 Sheets-Sheet 2 IN VEN TOR.

A TTORNEYS.

Patented '1937 UNITED fsm'ris PATENT oFFicE l c sommi charles Le am, n mela. cam. application my' 15, 199e, semi No. 19.909. zo claim.- (ci. s'z-mi' i' structure and means for articulating said struc-- ture for raisingand lowering the bucket vertically without tiltingit. l

Still another object is the provisin in a machine of the character described having a bucket of means whereby the bucket may be raised,

.15- lowered-and material discharged therefrom without tilting it. f f Still another object of this invention is the provision in a wheeled vehicle, of differential mechanism associating the wheels in pairs whereby the wheels in each pair may oscillate simultaneously in opposite directions in a vertical plane to the end that eachwheel in the pair may support its portion of the weight of the -vehicle 'appliedl to the pair in common whenthe vehicle travels over uneven surfaces.

` Still other objects, features and advantages of this invention will be apparent to those skilled in the art upon detailed perusal of the attached drawings and the following specifications, wherein I describe andexemplify my invention, but it is to be understood that myinvention as herein exemplied and described is susceptible to modiiication in thecombination.,correlation and construction of parts, members and. features without departing from 'the spirit of the invention as defined in the annexed claims.

In the drawings: l Figure 1 is 4a. plan view of my invention, the bucket being disposed in `carrying position.

, Figure 2 is a sidevelevation of Figure 1. Figure 3 is a side elevation in section taken on a line 3 3, all parts being in loading position. the rear gate being'also shown in a dotted position indicating that the gate may swingnlengthwise of the bucket for `discharging material therevfrom without tilting it.

Figure 4 is a side elevation, in section, of the front axle taken on a line 4-4 of Figure 1. Figure 5 is a rear elevation of the rear end of my invention, one of the rocker arms, see Figure 8, being removed to permit .viewingthe gear segments formed on each of .the rearwardly projecting arms. I a

Figure 6 is a fragmentary elevation of the rear end o f the invention showing a pair of wheels disposed on an uneven surface, each wheel of the the pair, as va unit.

Figure 'I is a fragmentary view in section giving a sideview of the gear segment formed oneach of the rearwardly projecting arms.

Figure 8 is a rocker a provided with a gear tooth or segment on ve h of its ends to mesh vwith gear segments carried by the rearwardly projecting arms. l

Referring now more particularly to the drawings, a frame! is provided with a front axle I0 havingA wheels II journaled' thereon forming a front truck. A draft tongue 'I2 is secured at its rear end to the front axle I0 and is'adapted at its front end forconnection to any suitable draft device 'for drawing the scraper along the ground,

pair supporting its portion of. welghtapplied to such as a tractor. The draft tongue I2 may be pivotally secured to the front axlegill as shown in Figure 4.

The front-axle I0 is provided with an opening therethrough midway between its ends. A substantially vertical shaft I3 is turnably mounted 4in the front end of frame 9 and is provided at its lower end with a pair of lugs Il having openings therethrough and spaced apart to receive the front axle Il therebetween. A largebolt I5 passes through the openings in thellugs I4 and the front axle I0, thus turnably and rockably'n'iounting the lower endv of a post I8 on the i'ront` axle I0,

the post I6 being a portion of frame 9.

Reference character I'I designates generally a bucket. Bucket I1 comprises sidewalls I8 and a bottom I9 extending from the rear edge of the side walls to a position short of the front. The front edge of the bottom I9 is provided with a detachable scraper bladen. The bottom I9 is .arcuate in shape, the side walls I8 'overhanging portions thereof. A beam 2i extends transversely of the bucket `I1 forwardly of the scraper blade 20 and is rigidly secured at its opposite ends each to the overhanging portion of a side wall I8. Extending transversely of the bucket I 1 at the rea'r end-thereof is a beam 22 rigidly secured at its opposite ends each to a side wall I8.

Upstanding from side walls I8 and'rig'idly secured thereto are brackets 23 having journals 24. Pivtally mounted on the journals are arms 25. The journals 2l and the arms 25 constitute hinges supporting a reargate 26 extending transversely of the bucket I1, the arms 25 being seare rigidly secured to cross beams 22 and pivotally support, in any suitable manner, a cylinder-28having;the usual piston, and a piston rod 29 secured thereto, the forward end of the piston rod being pivotally connected by a wrist pin 30 to brackets 3| rigidly secured to the gate 26. Thus, it is apparentthat gate 26 may serve as a back wall for the bucket I1 and may be swung to sweep from one end of the bucket to the other for discharging material.

Arms 32 are pivotally secured between their ends each to a side walll at 33, and are rigidly secured at their lower ends to a transversely extending auxiliary bucket 34. Thus is provided an auxiliary bucket swingingly mounted between the overhanging portions of side walls I8, and relative to the scraper blade 2li. Rigidly mounted on cross beam 2| are two pairs of brackets 35. Brackets 35 serve as bearing for pivotally supporting a pair of hydraulic jacks 36 disposed one relative to each of the arms 32. Hydraulic jacks 36 comprise in each, a cylinder 31 having slidably mounted therein the usual piston` and piston rod 38, the outer ends of the piston rods being pivotally connected each to the upper end of an arm 32 at 39, the cylinder of each of the jacks 36 being pivotally mounted in brackets 35. Upon Voutstroke movement of piston rods 38, the auxiliary bucket 34 will be swung away from the bucket |1 to open it, and on instroke toward the bucket I1 to close it.

Frame 9 is pivotally connected at its rear end to the lower front end of side walls I8 at 40.

A pair of lugs 4I is rigidly secured to frame 9 and carries a pin 42 pivotally supporting one end of a hydraulic cylinder 43, said cylinder having a piston 44 slidably disposed therein and secured .to a piston rod 45, the outer end of piston rod 45 being pivotally connected at 46 to the upper end of arms 41 rigidly secured at their lower ends to beam 2|. Upon instroke movement of piston rod 45 the scraper blade 20 will be lowered and upon outstroke movement of piston 45 the scraper blade 20 will be raised.

Secured to the rear end of bowl I1 are bearings 48 having mounted therein a shaft 49. Journaled on shaft 49 are wheeled brackets 50, 52 and 53 each provided at its rear end with a rolling support.

Mounted on beam 22 are bearings 54 and 55 having journaled therein a shaft 56. Journaled on shaft 56 are rearwardly projecting arms 51, 58, 59 and 69 associated in pairs by a differential mechanism which will be described presently. Pivotally mounted on the rear ends of arms 51, 58, 59 and 69 by pins 6I, 62, 63 and 64 respectively are downwardly extending links 65, 66, 61 and 68 pivotally secured at their lower ends, as shown in Figures 2, 3 and '1, each to a wheeled bracket as at 69.

Wheeled brackets 50, 5|, 52 and 53 are disposed f in pairs together with related structure comprising links 65, 66, 61 and 68, and rearwardly projecting arms 51, 58. 59 and 60. Wheeled brackets 50 and 5I together with links 65 and 66 and rearwardly projecting arms 51 and 58 comanism includes a rearwardly projecting trunnion rigid with shaft 56 midway between rearwardly projecting arms 51 and 56. Rockably mounted on trunnion 10 is a rocker arm 1I having formed on each of its opposite ends a gear tooth 12 adapted to mesh with a gear segment 13 formed on the confronting faces of rearwardly projecting arms 51 and 58. Thus, shaft 56 being xed in a given position, wheeled brackets 50 and 5| may swing simultaneously in opposite directions but may not swing simultaneously in the same direction. The object of this arrangement is exemplied in Figure 6, wherein the wheels are shown as resting on an uneven surface and yet each wheel may support a portion of a load applied to the pair as a unit because the load is applied to the wheels through a differential mechanism. Applicant is aware that the differential mechanism is subject to many modifications and the stru'cture shown and described is presented to exemplify this broad feature of my invention and not by way of limitation.

Rigid with each end of shaft 56 is a downwardly extending crank arm 14. Rigid with frame 9 at each side thereof is an arm 15. A tension member 16 is disposed one at each of the opposite sides of bucket I1 pivotally lconnected at their front ends each to an arm at 11 and being pivotally connected at their rear ends each to the lower end of a crank arm 14 at 18.

In Figure 2 the various parts are shown in the load carrying position. Material in bucket I1 is retained therein by the auxiliary bucket 34, the auxiliary bucket being normally filled with material also. When it is desired to discharge the materials, hydraulic pressure is introduced simultaneously into the front ends of hydraulic cylinders 36 at 19, see Figure 1,'.openings 80 being y connected to discharge, whereupon piston and piston rods 38 will move rearwardly causing the auxiliary bucket 34 to be swung to open position,

see Figure 3, in which position the materials iny bucket 34 may spill outwardly therefrom onto the ground. Fluid may then be held static in the front ends of cylinders 36 to maintain the auxiliary bucket 34 in open position. Hydraulic pressure is then introduced into the rear end of cylinder 28 at 8|, the opening 82 being connected to discharge, whereupon rear gate 26 will be swung forwardly to sweep the materials forwardly out of bucket I1. Hydraulic pressure is then introduced into the front end of cylinder 28 at 82, the opening 8| being connected to discharge, whereupon rear gate 26 will be swung rearwardly to its normal position at the rear of bucket I1, as shown in Figure 2. Fluid may then be held static in the front end of cylinder 28 to retain rear gate 26 in its normal position at the rear of bucket I1. Auxiliary bucket 34 being in open position, to load bucket I1, hydraulic pressure is introduced into the upper en d of cylinder 43 at 93, opening 84 being connected to discharge, whereupon the bucket I1 will be lowered into scraping contact with the ground and by forward movement of the scraper over the ground dirt will be scraped up and loaded into bucket I1` After bucket I1 has been loaded hydraulic pressure is introduced into the rear ends of cylinders 36 at 85, opening 19 being connected to discharge, whereupon the auxiliary bucket will be closed. Hydraulic pressure may then be introduced into the front end of cylinder 43 at 84, opening 83 being connected to discharge,'to raise the bucket to carrying position. Fluid may then be held static in the lower end of cylinder 43 to retain the bucket I1 in carrying position.

It wm te noted that because of the arrangement o! the various parts, members and features of my invention, bucket II may be disposed in loading, carrying and discharging positions without applying tilting movement thereto. In other words, the bucket I1 of my invention maybe raised and lowered without tilting it as is usually done. This'feature-of my invention is advantageous because when bucket Il is in loading po-v sition the rear end of the` bucket is` disposed in closejproximity to the ground and therefore the -di`rt need not be forced upwardly as high as would be the case if the bucket i'l were only tilted clearance may be obtained between the under.

downwardly at its front end to load. Still another advantage resides in the fact that greater i side of the bucket at its rear end and the ground thereunder. y f f It will be readily understood that while I have shown a front axle Ill andl rolling supports Il, still lthe front end of frame 8 may be attached directly to' the draft device, the latter constituting, ineifect, a truck. I

I claimzt r 1.'A machine of the character described com- .,prising a bucket, wheels mounted on the rear tically without tilting it.

2. A machine of the character described com.

prising a bucket, wheels mounted on the rear end of the bucket for swinging movement in a vertical plane, a pony truck disposed forwardly of the bucket adapted for connection to a draft device, an Aarm mounted lon. and upstandlng from the pony truck, rearwardly extending arms rigid with the upsta'nding arm and pivoted'attheirv rear ends on 4the bucketat its front end, connecting means operably l associating the 'rearwardly extending arms and the swingably mounted wheels at the rear end of the bucket and means for swinging the rearwardly extending arms to move the bucket vertically without tilting it.

3.'A machine of the character described comprising a bucket, ground wheels mounted on the rear lend of' the bucketfor swinging movement in a vertical plane, a pony truck disposed for wardly of the bucket adapted for connection to a draft device, ari arm mounted on and upstand-v ing fron'ithe pony truck, rearwardly extending arms rigid with the upstanding arm and pivoted at their rear ends on the bucket at its front end,

connecting means operably associating the rearwardly extending arms and the swingably mounted ground wheels at the rear end of the bucket and a power thrust device disposed with `theupstanding arm 'and the' bucket and operable to swing4 the rearwardly extending arms and move the bucket vertically withouttilting it.

4. A machine of'the character described comprising a bucket.A ground wheels mounted on the rear end of the ,bucket for swinging movement in a verticalV plane, a pony truck disposed forwardly of the bucket adapted for connection to a draft device, a frame mounted at its front end on the pony truck and pivotally mounted at its rear end on .the bucket at its lower front end,

connecting means operably associating the frame and the swingably mounted ground wheels at the rear end of the bucket, and a hydraulically expansible strut mechanism mounted on the frame and connected to the bucket at a point spaced upwardly Vfrom the pivotal connection of the frame with the lower front end of the bucket and operable to swingthe frame and move the I* bucket vertically without tilting it.

5. A machine of the character described comprising a bucket open at both ends, ground wheels mounted on the rear end of the bucket f or swinging movement in a vertical plane, a pony truck disposed forwardly of Athe bucket adapted for connection to a draft device, a frame mounted at its front end on the pony truck and swingably mounted at its rear end on the bucket at its lower front end, connecting means operably associating the frame and the swingably mounted ground wheels at the rear end of the bucket'andmeans for swinging the frame to move the bucket vverti- .cally Without tilting it.

6. A' machine of the character described com# prising a bucket open at both ends, ground wheels mounted on the rear end of the bucket for vertical swinging-movement, a pony truck disposed for- ,wardlyof the `bucket adapted for'connection to av draft device, a frame mounted at its front end on the pony truck and pivotally mounted at its.

rear end on the bucket at its lower front end, connecting means operably associating the frame and the swingably mounted ground wheels at the rear end of the bucket and power operated means disposed with the frame and the bucket for swinging the frame to selectively raise and lower the bucket without tilting it.

'1. A machine of the character described cornl y prising a bucket open at both ends. ground wheels mounted on the rear end of the bucket for vertical swinging movement, a pony truck disposed forwardly of the bucket adapted for connection to a draft device. a frame mounted at its front end on the pony truck and swingably mounted at itsrear end on the bucket at its front end, connecting means articulately associating the frame and the swingably mounted ground wheels at the .rear end of the bucket. means for swinging the frame to selectively raise and lower the bucket withouttilting it, a gate adapted to bevmoved lengthwise of the 4bucket froml end to end andmeans for so moving the gate. Y

8. A machine of the character described comprising a bucket open at both ends. ground wheels mounted on the rearv end of the bucket for vertical swinging movement, a pony truck disposed forwardly of the bucket adapted for connection to a draft device, a frame mounted at its front end on the pony truck and 4swingably mounted lat its rear end on the bucket at its -front end,

connecting meansV articulately associating the frame and theswing'ably mounted ground wheels,

at the rear end of the bucket, means for swinging the frame to move the bucket vertically without tilting it, a gate adapted to be moved lengthwise of the bucket from end to end and power t, operated means disposed rearwardly of the bucket to move the gate. i

9. A machine of the character described comprising a bucket open at both ends, ground wheels mounted on the rear end of the bucket for vertical-swinging movement. a ponytruck disposed e forwardly of the bucket adapted for connection to a draft device, a frame mounted -at its front end on the pony truck and pivotally mounted at its rear end on the bucket'at its front end, con- 75 necting means articulately associating the frame and the swingably mounted ground wheels at the rear end of the bucket, power operated means for swinging the frame to move the bucket vertically without tilting it, a gate adapted to be moved lengthwise of the bucket from end to end and power operated means mounted on the bucket to move the gate.

10. A machine of the character described comprising a bucket open at both ends, ground wheels mounted on the rear end of the bucket for vertical swinging movement, a pony truck disposed forwardly of the bucket adapted for connection to a draft device, a frame mounted at its front end on the pony truck and pivotally mounted at its rear end on the bucket at its front end, connecting means articulately associating the frame and the swingably mounted ground wheels at the rear end of the bucket, hydraulically operated means for swinging the frame to move the bucket vertically without tilting it, a gate adapted to be moved lengthwise of the bucket from end to end and hydraulically operated means to move the gate.

11. A machine of the character described comprisiiig a bucket open at both ends, ground wheels mounted on the rear end of the bucket for vertical swinging movement,l a pony truck disposed forwardly of the bucket adapted for connection to a draft device, a frame mounted at its front end on the pony truck and pivotally mounted at its rear end on the bucket at its front end, connecting means articulately associating the frame and the swingably mounted ground wheels at the rear end of the bucket, means for swinging the frame to move the bucket vertically without tilting it, a gate pivotally supported on the bucket and adapted to be swung lengthwise of the bucket from end to end and means to swing the gate.

12. A machine of the character described comprising a bucket open at both ends, ground wheels mounted on the rear end ofthe bucket for vertical swinging movement, a'pony truck disposed forwardly of the bucket adapted for connection to a draft device, a frame mounted at its front end on the pony truck and pivotally mounted at its rear end on the bucket at its front end, connecting means articulately associating the frame and the swingably mounted ground wheels at the rear end of the bucket, power operated means for swinging the frame to move the bucket vertically without tilting it, a gate pivotally supported on the bucket and adapted to be swung lengthwise of the bucket from end to end and power operated means to swing the gate.

13. A machine of the character described comprising a, bucket open at both ends, ground wheels mounted on the rear end of the bucket for vertical swinging movement, a pony truck disposed forwardly of the bucket adapted for connection to a draft device, a frame mounted at its front end on the pony truck and pivotally mounted at its rear end on the bucket at its front end, connecting means articulately associating the frame and the swingably mounted ground wheels at thev rear end of the bucket, hydraulically operated means for swinging the frame to move the bucket vertically without tilting it, a gate pivotally supported on the bucket and adapted to be swung lengthwise of the bucket from end to end and hydraulically operated means to swing the gate.

14. A machine of the character described comprising a main bucket open at both ends, ground wheels mounted on the rear end of the main bucket for vertical swinging movement, a pony truck disposed forwardly of the main bucket adapted for connection to a draft device, a frame mounted at its end on the pony truck and pivotally mounted at its rear end on the main bucket at its front end, connecting means articulately associating the frame and the swingably mounted ground wheels at the rear end of the main bucket, means for swinging the frame to move the main bucket vertically without tilting it, a. gate adapted to be moved lengthwise of the main bucket from end to end, means to move the gate, an auxiliary bucket adapted to be moved to open and close the front end of the main bucket and means to move the auxiliary bucket.

l5. A machine of the character described comprising a main bucket open at both ends, ground wheels mounted on the rear end of the main bucket for vertical swinging movement, a pony truck disposed forwardly of the main bucket adapted for connection to a draft device, a frame mounted at its front end on the pony truck and pivotally mounted at its rear end on the main bucket at its front end, connecting means articu- `lately associating the frame and the swingably mounted ground wheels at the rear end of the main bucket, power operated means for swinging the frame to move the main bucket vertically without tilting it, a gate adapted to be moved lengthwise of the main bucket from end to end, power operated means to move the'gate, an auxiliary bucket adapted to" be moved to open and close the front end of the main bucket and power operated means to move the auxiliary bucket.

16. A machine of the character described comprising a main bucket open at both ends, ground wheels mounted on the rear end of the main bucket for vertical swinging movement, a pony truck disposed forwardly of the main bucket adapted for connection to a draft device, a frame mounted at its front end on the pony truck and pivotally mounted at its rear end on the main bucket at its front end, connecting means articulately associating the frame structure and the swingably mounted ground wheels at the rear end of the main bucket, hydraulically operated means for swinging the frame to move the main bucket vertically without tilting it, a gate adapted to be moved lengthwise of the main bucket from end to end, hydraulically operated means to move the gate, an auxiliary bucket adapted to be moved toppen and .close the frontend of the main bucket and hydraulically operated means to move the auxiliary bucket.

y1'7. A machine of the character described comprising a bucket, a plurality of wheeled brackets mounted on the rear end of the bucket for vertical swinging movement, a crank shaft journaled pony truck and swingably mounted at its rear end on the front end of the bucket, frame extensions rigid with and upstanding from the frame, tension members pivotally connected at their front ends to the upper ends of the frame extensions and at their rear ends to the lower ends of the crank arms and means for swinging the frame to move the lbucket vertically without tilting4 it.

18. A machine of the character described comprising a bucket, a plurality of wheeled brackets mounted on the rear end of the bucket for vertical swinging movement, a crank shaft journaled on -the rear end of the bucket above the wheeled brackets, rearwardly projecting arms swingably mounted on the crank shaft, diierential mechanism disposed with the rearwardly. projecting arms and associating the same in pairs, said differential'mechanism serving to prevent swinging movement of the arms in each pair in the same direction and permitting swinging movement in opposite directions, links pivotally connected at their upper ends tothe rear ends of the rearwardly projecting arms and at their lower ends to the wheeled brackets, a downwardly extending crank arm rigid with each of the opposite ends of the crank shaft, a pony truck disposed in front of the bucket adapted for connection to a draft device, a frame mounted at its front end on the pony truck and swingably mounted at i its rear end on the bucket at its front end, frame extensions rigid with and upstanding for the frame' at its rear end, tension members pivotally connected at their front ends to the upper 'ends of the frame'extensions and at their rear ends tothe lower ends of the crank armsand means for swinging the frame to move the bucket vertically without tilting it.

' 19. A machine of the character described comprising a bucket, wheels mounted on the rear end of the bucket for swinging movement in a vertical plane,` a frame disposed forwardly of the bucket and adapted for connection to a draft device, a frame mounted at its front end on the rst mentioned frame and swingably mounted at its rear end on the bucket, connecting means operably associating the frame and the swingably mounted wheels at -the rear end of the bucket and means for swinging the frame to mov'e the bucket vertically. f

20. A machine of the character described comprising a bucket, wheels mounted on the rear end of the bucket for swinging movement in a vertical plane, a pony truck disposed forwardly of the bucket and 'adapted for connection to a draft device, a frame mounted at its front end on the pony truck and swingably mounted at its rear end on the bucket, connecting means operably associating the frame and the swingably mounted wheels at the rear end of the bucket and means for swinging the frame" to move the bucket vertically.

CHARLES LE BLEU. 

